CN107003565B - Light deflection diffusion sheet, stacked optical sheet, and liquid crystal display device using the same - Google Patents

Light deflection diffusion sheet, stacked optical sheet, and liquid crystal display device using the same Download PDF

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Publication number
CN107003565B
CN107003565B CN201580067245.9A CN201580067245A CN107003565B CN 107003565 B CN107003565 B CN 107003565B CN 201580067245 A CN201580067245 A CN 201580067245A CN 107003565 B CN107003565 B CN 107003565B
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China
Prior art keywords
light
layer
liquid crystal
crystal panel
deflection
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Expired - Fee Related
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CN201580067245.9A
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Chinese (zh)
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CN107003565A (en
Inventor
小沼修
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Samsung Electronics Co Ltd
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Samsung Electronics Co Ltd
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Priority claimed from PCT/KR2015/013466 external-priority patent/WO2016093625A1/en
Publication of CN107003565A publication Critical patent/CN107003565A/en
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Expired - Fee Related legal-status Critical Current
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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/308—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising acrylic (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
    • B32B37/142—Laminating of sheets, panels or inserts, e.g. stiffeners, by wrapping in at least one outer layer, or inserting into a preformed pocket
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
    • G02B5/021—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures
    • G02B5/0215—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures the surface having a regular structure
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
    • G02B5/021—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures
    • G02B5/0221—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures the surface having an irregular structure
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
    • G02B5/0236—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element
    • G02B5/0242—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element by means of dispersed particles
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0273—Diffusing elements; Afocal elements characterized by the use
    • G02B5/0278—Diffusing elements; Afocal elements characterized by the use used in transmission
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0273—Diffusing elements; Afocal elements characterized by the use
    • G02B5/0284—Diffusing elements; Afocal elements characterized by the use used in reflection
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133605—Direct backlight including specially adapted reflectors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2457/00—Electrical equipment
    • B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
    • B32B2457/202—LCD, i.e. liquid crystal displays
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses

Abstract

Disclosed are a light deflection diffusion sheet, a stacked light deflection diffusion sheet, and a stacked optical sheet for use in a liquid crystal panel. A Liquid Crystal Display (LCD) device includes: a liquid crystal panel having a length direction and a width direction; a surface light emitting module; a substrate disposed between the liquid crystal panel and the surface light emitting module; a light diffusion layer that is disposed on a surface of the substrate facing the surface light-emitting module and diffuses light incident from the surface light-emitting module; and a light deflecting layer which is provided on a surface of the substrate facing the liquid crystal panel and controls a traveling direction of the light.

Description

Light deflection diffusion sheet, stacked optical sheet, and liquid crystal display device using the same
Technical Field
The present disclosure relates to an optical sheet disposed between a liquid crystal panel and a surface light emitting module in a Liquid Crystal Display (LCD) device.
The present disclosure also relates to an LCD device using the optical sheet.
Background
As a flat panel display device used in a notebook computer, a Television (TV), or a portable mobile phone, which is required to be thin, small-sized, and low power consumption, a Plasma Display Panel (PDP), a field emission display device (FED), a thin film transistor liquid crystal display (TFT-LCD) device, and the like have been recently developed. Among the above, active research on a Liquid Crystal Display (LCD) device having excellent color reproduction and thickness has been conducted.
In the flat panel display device, although the PDP and the FED may be capable of self-emission, the LCD may radiate light by using an auxiliary backlight unit as an auxiliary light source in order to obtain image display because the LCD is not capable of self-emission. The backlight unit has a structure of a surface light source, which is called an edge type or a direct type, so as to satisfy that light is uniformly irradiated to the entire screen.
Disclosure of Invention
Technical problem
The present disclosure relates to an optical sheet that reduces light loss of a Liquid Crystal Display (LCD) device and enables an LCD to have enhanced brightness and viewing angle, and an LCD using the same.
Technical scheme
According to an embodiment, a Liquid Crystal Display (LCD) device includes: a liquid crystal panel having a length direction and a width direction; a surface light emitting module; a substrate disposed between the liquid crystal panel and the surface light emitting module; a light diffusion layer disposed on a surface of the substrate facing the surface light emitting module and diffusing light incident from the surface light emitting module; and a light deflecting layer that is provided on a surface of the substrate facing the liquid crystal panel and controls a traveling direction of the light.
Advantageous effects
An optical sheet according to an embodiment of the present disclosure includes a light diffusion layer and a light deflection layer, thereby reducing optical loss of a Liquid Crystal Display (LCD) device.
In addition, the optical sheet according to the embodiment of the present disclosure includes a prism pattern and a reflective polarizer, thereby enhancing brightness and viewing angle of the LCD.
Drawings
Fig. 1 is an exploded cross-sectional view of a Liquid Crystal Display (LCD) device according to an embodiment.
Fig. 2 is a plan view of a light deflection diffusion sheet of a Liquid Crystal Display (LCD) device according to an embodiment.
Fig. 3a is a cross-sectional view of a stacked optical sheet including a light deflecting diffusion sheet according to an embodiment (cross-sectional view of III-III' in fig. 2) in an LCD device according to an embodiment.
Fig. 3b is a cross-sectional view of a stacked optical sheet including a light deflecting diffusion sheet according to an embodiment (cross-sectional view of III-III' in fig. 2) in an LCD device according to an embodiment.
Fig. 4 is an exploded cross-sectional view of an LCD device according to another embodiment.
Fig. 5a is a plan view of a light deflection diffusion sheet of an LCD device according to another embodiment.
Fig. 5b is a plan view of a light deflection sheet of an LCD device according to another embodiment.
FIG. 6a is a cross-sectional view of a stacked optical sheet including a stacked light deflecting diffusion sheet according to an embodiment in an LCD device according to another embodiment (a cross-sectional view of VIA-VIA' in FIG. 5 a).
FIG. 6b is a cross-sectional view of a stacked optical sheet including a stacked light deflecting diffusion sheet according to an embodiment (cross-sectional view VIB-VIB' in FIG. 5 b) in an LCD device according to another embodiment.
FIG. 7 is a cross-sectional view of a stacked optical sheet including a stacked light deflection diffusing sheet according to an embodiment in an LCD device according to another embodiment (a cross-sectional view of VIA-VIA' in FIG. 5 a).
Fig. 8 is a cross-sectional view of a bonding layer according to an embodiment.
Detailed Description
Embodiments of the present disclosure include a Liquid Crystal Display (LCD) device, including: a liquid crystal panel having a length direction and a width direction; a surface light emitting module; a substrate disposed between the liquid crystal panel and the surface light emitting module; a light diffusion layer disposed on a surface of the substrate facing the surface light emitting module and diffusing light incident from the surface light emitting module; and a light deflecting layer that is provided on a surface of the substrate facing the liquid crystal panel and controls a traveling direction of the light.
The surface light emitting module may include at least one of an edge type surface light emitting module or a direct type surface light emitting module.
The light deflecting layer may include a prism pattern having a ridge portion parallel to a length direction of the liquid crystal panel.
The light diffusing layer may include a roughened surface that diffuses and scatters light.
The light diffusing layer may include a plurality of light scattering beads (beads) that diffuse and scatter light.
The LCD device may further include: a reflective deflection sheet disposed on the light deflection layer and reflecting one of the deflected lights to the surface light emitting module.
The LCD device may further include: a bonding layer configured to combine the light deflecting layer and the reflective deflection sheet.
The bonding layer may include: an adhesive layer bonded to the light deflecting layer; and a light diffusing layer coupled to the reflective deflection sheet and including a plurality of light scattering beads.
Embodiments of the present disclosure include a Liquid Crystal Display (LCD) device, including: a liquid crystal panel having a length direction and a width direction; a surface light emitting module; a first substrate disposed between the liquid crystal panel and the surface light emitting module; a light diffusion layer disposed on a surface of the first substrate facing the surface light emitting module and diffusing light incident from the surface light emitting module; and a first light deflection layer which is provided on a surface of the first substrate facing the liquid crystal panel and controls a traveling direction of the light; a second substrate disposed between the liquid crystal panel and the first light deflection layer; and a second light deflecting layer disposed on a surface of the second substrate facing the liquid crystal panel.
The surface light emitting module may include at least one of an edge type surface light emitting module or a direct type surface light emitting module.
The first light deflecting layer may include a first prism pattern having a ridge portion parallel to a width direction of the liquid crystal panel, and the second light deflecting layer includes a second prism pattern having a ridge portion parallel to a length direction of the liquid crystal panel.
The light diffusing layer may include a roughened surface that diffuses and scatters light.
The light diffusing layer may include a plurality of light scattering beads (beads) that diffuse and scatter light.
The LCD device may further include: a reflective deflection sheet disposed on the second light deflection layer and reflecting one of the deflected lights to the surface light emitting module.
The LCD device may further include: a bonding layer configured to combine the second light redirecting layer and the reflective deflection sheet.
The bonding layer may include: an adhesive layer bonded to the light deflecting layer; and a light-diffusing bonding portion bonded to the reflective deflection sheet and including a plurality of light-scattering beads.
Embodiments of the present disclosure include a light deflection diffusion sheet disposed between a light crystal panel (light crystal panel) having a length direction and a width direction and a surface light emitting module, the light deflection diffusion sheet including: a substrate; a light diffusion layer disposed on a surface of the substrate facing the surface light emitting module and diffusing light incident from the surface light emitting module; and a light deflecting layer that is provided on a surface of the substrate facing the liquid crystal panel and controls a traveling direction of the light.
The light deflection diffusion sheet may further include: a reflective deflection sheet disposed between the liquid crystal panel and the light deflection layer and reflecting one of the deflected lights to the surface light emitting module.
Embodiments of the present disclosure include a stacked light deflection diffuser sheet disposed between a light crystal panel (light crystal panel) having a length direction and a width direction and a surface light emitting module, the stacked light deflection diffuser sheet comprising: a first substrate; a light diffusion layer disposed on a surface of the first substrate facing the surface light-emitting module and diffusing light incident from the surface light-emitting module; a first light deflection layer that is provided on a surface of the first substrate facing the liquid crystal panel and controls a traveling direction of the light; a second substrate disposed between the liquid crystal panel and the first light deflection layer; and a second light deflecting layer disposed on a surface of the second substrate facing the liquid crystal panel, wherein the first light deflecting layer includes a first prism pattern having a ridge portion parallel to a width direction of the liquid crystal panel, and wherein the second light deflecting layer includes a second prism pattern having a ridge portion parallel to a length direction of the liquid crystal panel.
The stacked light deflecting diffusion sheet may further include: a reflective deflection sheet disposed between the liquid crystal panel and the second light deflection layer and reflecting one of the deflected lights to the surface light emitting module.
Detailed Description
Reference will now be made in detail to embodiments, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout. In this regard, the present embodiments may take different forms and should not be construed as limited to the description set forth herein. Accordingly, the embodiments are described below by referring to the drawings only to explain aspects of the embodiments. In the drawings, parts irrelevant to the description will be omitted for convenience of explanation. Like reference numerals refer to like elements throughout the description of the figures.
Throughout this specification, it will be understood that when a unit is referred to as being "connected" to another element, it can be "directly connected" to the other element or "electrically connected" to the other element with an intervening element present. In addition, it will be understood that when an element is referred to as "comprising" another element, it does not exclude that one or more other elements may be present or may be added.
Fig. 1 is an exploded cross-sectional view of a Liquid Crystal Display (LCD) device 1 according to an embodiment.
Referring to fig. 1, the LCD device 1 includes a liquid crystal panel 10, a surface light emitting module 20 functioning as a backlight, and a stacked optical sheet 60.
The liquid crystal panel 10 includes a liquid crystal cell 10A and absorption polarizers 14 and 15 disposed on upper and lower outer surfaces of the liquid crystal cell 10A.
The liquid crystal cell 10A includes: a pair of transparent substrates 12 and 13, the pair of transparent substrates 12 and 13 being arranged to face each other with a predetermined distance between the pair of transparent substrates 12 and 13; and a liquid crystal layer 11 formed by sealing liquid crystal between the pair of transparent substrates 12 and 13. A transparent electrode (not shown) or an alignment layer (not shown) may be formed in each of the pair of transparent substrates 12 and 13. A voltage may be applied between the transparent electrodes based on display data and thus liquid crystals of the liquid crystal layer 11 may be aligned.
Absorbing polarizing plates 14 and 15 may be provided on upper and lower outer surfaces of the liquid crystal cell 10A, the absorbing polarizing plates 14 and 15 absorbing one of the S-deflected light and the P-deflected light and selectively transmitting the other deflected light.
In addition, a phase difference sheet (not shown) may be formed between the liquid crystal cell 10A and the absorbing deflection light sheets 14 and 15.
The surface light emitting module 20 may include a light source 21, a light guide plate 22 guiding light emitted from the light source 21, and a light reflection sheet 23 disposed on a lower portion of the light guide plate 22.
The light source 21 may generate light and may use different light sources such as a linear light source lamp, a surface light source lamp, CCFL, LED, or the like.
The light guide plate 22 may guide light generated from the light source 21 to the inside thereof so that the light may reach the front surface of the light reflection sheet 23. When a direct type light source is employed, the light guide plate 22 may be omitted.
The light reflection sheet 23 may reflect light emitted from the light source 21 and guided by the light source plate 22, thereby emitting the light to the outside of the light source plate 22.
The stacked optical sheet 60 may be disposed between the liquid crystal panel 10 and the surface light emitting module 20. The stacked optical sheet 60 may include a light deflection diffusion sheet 30, a reflective deflection sheet 50 disposed on the light deflection diffusion sheet 30, and a bonding layer 41 combining the light deflection diffusion sheet 30 and the reflective deflection sheet 50.
The light deflection diffusion sheet 30 may be an optical sheet having a light deflection function and a light diffusion function.
The reflective deflection sheet 50 may selectively reflect the deflected light, which is absorbed by the absorbing deflection sheet 14 disposed on the lower portion of the liquid crystal panel 10. That is, the reflective deflection sheet 50 may reflect the deflected light to be absorbed by the absorptive deflection sheet 14 to the surface light emitting module 20 in advance. The light reflected by the reflective deflecting sheet 50 to the surface light emitting module 20 may be repeatedly and completely reflected again within the light guide plate 22. During full reflection, the light may be partially converted into deflected light, which is transmitted through the absorbing deflection plate 14. Thus, the amount of deflected light absorbed by the absorbing deflection sheet 14 can be reduced, and thus the brightness of the LCD device 1 can be enhanced. The reflective deflection sheet 50 may be omitted.
The light deflection diffusion sheet 30 and the reflective deflection sheet 50 may be combined and integrated into the stacked optical sheet 60 by the bonding layer 41 including glue or adhesive or the like. The stacked optical sheets 60 may prevent the sheets from being bent and may enhance handling of the sheets, thereby facilitating assembly of the LCD device 1.
Further, the stacked optical sheet 60 and the liquid crystal panel 10 may be combined by the bonding layer 44.
Fig. 2 is a plan view of the light deflection diffusion sheet 30 of the LCD device 1 according to the embodiment.
Referring to fig. 2, the light deflection diffusion sheet 30 may include prism patterns 32P that control a traveling direction of light emitted to the surface of the liquid crystal panel 10 of the light deflection diffusion sheet 30. The prism pattern 32P may have a ridge L1 parallel to the length direction of the LCD device 1.
In general, the LCD device 1 has a characteristic that a viewing angle in a horizontal direction is more important than a viewing angle in a vertical direction like a liquid crystal TV. The ridges L1 of the prism pattern 32P may be formed in the lengthwise direction of the LCD device 1, and thus the viewing angle in the horizontal direction may be effectively increased. Further, the ridge direction of the prism pattern 32P may be changed according to the use of the LCD device 1 or the like.
Fig. 3a is a cross-sectional view of a stacked optical sheet 60X including a light deflecting diffusion sheet 30X according to an embodiment in the LCD device 1 according to an embodiment (cross-sectional view of III-III' in fig. 2). Stacked optical sheet 60X is an embodiment of stacked optical sheet 60 of fig. 1. The stacked optical sheet 60X may be disposed between the liquid crystal panel 10 and the surface light emitting module 20 of fig. 1.
Referring to fig. 3a, the light deflection diffusion sheet 30X may include a substrate 31, a light diffusion layer 33X disposed on a lower surface of the substrate 31, and a light deflection sheet 32 disposed on an upper surface of the substrate 31.
The substrate 31 may include a material such as PET (polyethylene terephthalate) or polyester, and may transmit incident light. The substrate 31 may have a thickness of from about 50 μm to 300 μm, but is not limited thereto.
The light diffusion layer 33X may be disposed on a lower surface of the substrate 31, i.e., on a surface of the surface light emitting module 20 of the substrate 31. The light diffusion layer 33X may include a flat base 33B and a light diffusion portion 33P, the light diffusion portion 33P being formed below the base 33B and having a rough surface R1 that functions to diffuse light.
The light diffusion part 33P may have a thickness from about 20 to 50 μm, but is not limited thereto.
The base 33B has a thickness of from about 5 to 10 μm, but is not limited thereto.
Light emitted from the light source 21 of the surface light-emitting module 20 and then passing through the light guide plate 22 and being incident into the light diffusion layer 33X may be diffused and scattered by the rough surface R1 of the light diffusion layer 33X. The light diffusion layer 33X may diffuse and scatter light and supply the light to the light deflection layer 32.
The optical deflection layer 32 may be disposed on the upper surface of the substrate 31, i.e., on the surface of the liquid crystal panel 10 of the substrate 31. The light deflecting layer 32 may include a flat base 32B and a prism pattern 32P, and the prism pattern 32P is formed above the base 32B and controls the traveling direction of light.
The prism pattern 32P has a thickness from about 20 to 50 μm, but is not limited thereto. Further, the apex angle of the prism pattern 32P may have a range of 90 ° ± 5 °, but is not limited thereto.
The base portion 32B has a thickness of from about 5 μm to 10 μm, but is not limited thereto.
The light deflecting layer 32 may diffract light incident through the light diffusing layer 33X and focus the light to the planar surface of the liquid crystal panel 10.
The light diffusion layer 33X and the light deflection layer 32 may include a light-transmitting resin such as an acrylic resin or the like.
The bonding layer 41 connecting the ridges L1 may be formed on the plurality of prism patterns 32P of the light deflection layer 32. Between two adjacent prism patterns 32P, an air portion a1 surrounded by the two adjacent prism patterns 32P and the bonding layer 41 may be formed. The bonding layer 41 may not be formed in the air part a 1. Accordingly, light emitted from each surface of the prism pattern 32P may not be diffracted by the bonding layer 41 and a traveling direction of the light may be controlled.
Further, the bonding layer 41 may combine the light deflection diffusion sheet 30X and the reflective deflection sheet 50 into an integrated stacked optical sheet 60X.
In the use of liquid crystal TV or the like, the luminance of the LCD device 1 may be more than 2900cd/m2And preferably more than 3000cd/m2。
In use of a liquid crystal TV or the like, both the horizontal viewing angle and the vertical viewing angle of the LCD device 1 may be more than 52 °, and may preferably be more than 55 °.
The horizontal viewing angle and the vertical viewing angle may be angles having a central brightness of 1/2.
In order to suit the luminance and viewing angle of the LCD device 1, the haze value of the light diffusion portion 33P of the light diffusion layer 33X may range from about 5% to about 70%, preferably from about 5% to 30%, and particularly from 5% to 20%.
The light deflection diffusion sheet 30X may be manufactured by:
first, a substrate 31 may be prepared, and the upper surface of the substrate 31, i.e., the surface of the liquid crystal panel 10, may be coated with a resin paste including a curable resin and a solvent, and thus a first uncured resin layer may be formed. Further, the lower surface of the substrate 31, i.e., the surface of the surface light emitting module 20 may be coated with a resin paste including a curable resin and a solvent, and thus a second uncured resin layer may be formed.
Next, the solvent may be dried and removed from the first uncured resin layer and the second uncured resin layer.
Next, a first mold having a flip-chip pattern of the prism pattern 32P may be used to form a pattern on the first uncured resin layer, and a second mold having a flip-chip pattern of the rough surface R1 may be used to form a pattern on the second uncured resin layer.
Next, thermal curing or optical curing may be used to cure the first uncured resin layer and the second uncured resin layer and form the light deflecting layer 32 and the light diffusing layer 33X.
By the above process, the light deflection diffusion sheet 30X can be manufactured without using glue, adhesive, or the like.
The method of manufacturing the light deflection diffusion sheet 30X according to the above embodiment can reduce the amount of glue or adhesive used, thereby reducing optical loss of the LCD device 1 and enhancing brightness and viewing angle of the LCD device 1, as compared to a technique of combining layers by using glue or adhesive. Further, a low-cost and concise manufacturing process of the LCD device 1 can be promoted.
Fig. 3b is a cross-sectional view of the stacked optical sheet 60Y including the light deflecting diffusion sheet 30Y according to the embodiment in the LCD device 1 according to the embodiment (cross-sectional view of III-III' in fig. 2). The stacked optical sheet 60Y is an embodiment of the stacked optical sheet 60 of fig. 1. The stacked optical sheet 60Y may be disposed between the liquid crystal panel 10 and the surface light emitting module 20 of fig. 1.
Referring to fig. 3b, the light deflection diffusion sheet 30Y may include a substrate 31, a light diffusion layer 33Y disposed on a lower surface of the substrate 31, and a light deflection sheet 32 disposed on an upper surface of the substrate 31.
The substrate 31 and the optical deflection layer 32 may be the same as the substrate 31 and the optical deflection layer 32 of fig. 3a described above, and thus a description thereof is omitted.
The light diffusion layer 33Y may be disposed on a lower surface of the substrate 31, i.e., on a surface of the surface light emitting module 20 of the substrate 31. The light diffusion layer 33Y may include a light-transmitting resin layer 33M and a plurality of light-scattering beads B1 formed in the light-transmitting resin layer 33M.
Light emitted from the light source 21 of the surface light-emitting module 20 and then passing through the light guide plate 22 and being incident into the light diffusion layer 33Y may be diffused and scattered by the light scattering beads B1. The light diffusion layer 33Y may diffuse and scatter light and supply the light to the light deflection layer 32.
The light scattering bead B1 may be formed of an acrylic resin, a styrene synthetic resin, or the like.
The light diffusion layer 33Y may have a thickness from about 20 to 50 μm, but is not limited thereto.
Each of the light scattering beads B1 may have a diameter of from about 0.1 μm to 50 μm, but is not limited thereto. The light scattering bead B1 may have a uniform diameter and may have different diameters. Further, the diameter and distribution density of the light scattering beads B1 may be adjusted according to the haze value to be implemented.
In order to suit the brightness and viewing angle of the LCD device 1, the haze value of the light diffusion layer 33Y may range from about 5% to about 70%, preferably from about 5% to 30%, and particularly from 5% to 20%.
The light diffusion layer 33Y is manufactured by:
first, a substrate 31 may be prepared, and the upper surface of the substrate 31, i.e., the surface of the liquid crystal panel 10, may be coated with a resin paste including a curable resin and a solvent, and thus a first uncured resin layer may be formed. Further, the lower surface of the substrate 31, i.e., the surface of the surface light emitting module 20 may be coated with a resin paste including the light scattering bead B1 and a solvent, and thus a second uncured resin layer may be formed.
Next, the solvent may be dried and removed from the first uncured resin layer and the second uncured resin layer.
Next, a mold having a flip-chip pattern of the prism pattern 32P may be used to form a pattern on the first uncured resin layer.
Next, thermal curing or optical curing may be used to cure the first uncured resin layer and the second uncured resin layer and form the light deflecting layer 32 and the light diffusing layer 33Y.
By the above process, the light deflection diffusion sheet 30Y can be manufactured without using glue, adhesive, or the like.
The method of manufacturing the light deflection diffusion sheet 30X according to the above embodiment can reduce the amount of glue or adhesive used, thereby reducing optical loss of the LCD device 1 and enhancing brightness and viewing angle of the LCD device 1, as compared to a technique of combining layers by using glue or adhesive. Further, a low-cost and concise manufacturing process of the LCD device 1 can be promoted.
Fig. 4 is an exploded cross-sectional view of an LCD device 2 according to another embodiment.
Referring to fig. 4, the LCD device 2 includes a liquid crystal panel 10, a surface light emitting module 20 functioning as a backlight, and stacked optical sheets 100.
The liquid crystal panel 10 and the surface light-emitting module 20 are the same as the liquid crystal panel 10 and the surface light-emitting module 20 of fig. 1 described above, and thus descriptions thereof are omitted.
The stacked optical sheet 100 may be disposed between the liquid crystal panel 10 and the surface light emitting module 20. The stacked optical sheet 100 may include a stacked light deflection diffusion sheet 90, a reflective light deflection sheet 50 disposed on the stacked light deflection diffusion sheet 90, and a bonding layer 43 combining the stacked light deflection diffusion sheet 90 and the reflective light deflection sheet 50.
The stacked light deflection diffusion sheet 90 may be an optical sheet having a light deflection function and a light diffusion function.
The reflective deflection sheet 50 may selectively reflect the deflected light to be absorbed to the absorbing deflection sheet 14 disposed on the lower portion of the liquid crystal panel 10. That is, the reflective deflection sheet 50 may reflect the deflected light absorbed to the absorptive deflection sheet 14 to the surface light emitting module 20 in advance. The light reflected by the reflective deflecting sheet 50 to the surface light emitting module 20 may be repeatedly and completely reflected again within the light guide plate 22. During full reflection, the light may be partially converted into deflected light, which is transmitted through the absorbing deflection plate 14. Thus, the amount of deflected light absorbed into the absorbing deflection sheet 14 can be reduced, and thus the brightness of the LCD device 1 can be enhanced. The reflective deflection sheet 50 may be omitted.
The stacked light deflection diffusion sheet 90 and the reflective deflection sheet 50 may be combined and integrated into the stacked optical sheet 100 by the bonding layer 43 including glue or adhesive or the like. Stacking the optical sheets 100 may prevent the sheets from being bent and may enhance handling of the sheets, thereby facilitating assembly of the LCD device 1.
Fig. 5a is a plan view of a light deflection diffusion sheet 70 of an LCD device 2 according to another embodiment. Fig. 5b is a plan view of a light deflection sheet 80 of an LCD device 2 according to another embodiment.
Referring to fig. 5a, the light deflection diffusion sheet 70 may include a first prism pattern 72P that controls a traveling direction of light emitted to the surface of the liquid crystal panel 10 of the light deflection diffusion sheet 70. The prism pattern 72P may have a ridge L2 parallel to the width direction of the LCD device 2. The width direction of the LCD device 2 means the Y-axis direction.
Referring to fig. 5b, the light deflection plate 80 may include a second prism pattern 82P that controls a traveling direction of the emitted light to the surface of the liquid crystal panel 10 of the light deflection plate 80. The second prism pattern 82P may have a ridge portion L3 parallel to the length direction of the LCD device 2. The lengthwise direction of the LCD device 2 means the X-axis direction.
The ridges L2 of the first prism patterns 72P of the light deflection diffusion sheet 70 and the ridges L3 of the second prism patterns 82P of the light deflection sheet 80 may be orthogonal to each other, and thus the light deflection of the light deflection diffusion sheet 70 and the light deflection sheet 80 may be efficiently operated and increase the brightness. Further, the viewing angle of the LCD device 2 in the horizontal and vertical directions can be adjusted to a suitable angle.
In general, the LCD device 2 has a characteristic that a viewing angle in a horizontal direction is more important than a viewing angle in a vertical direction like a liquid crystal TV. Between the light deflection diffusion sheet 70 and the light deflection sheet 80, the ridge L3 of the prism pattern 82P of the light deflection sheet 80 arranged in the liquid crystal panel 10 can be set to the length direction of the LCD device 2, and thus the viewing angle in the horizontal direction can be effectively increased. The directions of the ridges L2 and L3 of the first and second prism patterns 72P and 82P of the light deflection diffusion sheet 70 and the light deflection sheet 80 are not limited thereto and may be appropriately changed.
FIG. 6a is a cross-sectional view of a stacked optical sheet 100X including a stacked light deflecting diffuser sheet 90X (a cross-sectional view of VIA-VIA' in FIG. 5 a) in an LCD device 2 according to another embodiment. FIG. 6b is a cross-sectional view of a stacked optical sheet 100X including a stacked light deflecting diffuser sheet 90X according to another embodiment (cross-sectional view VIB-VIB' in FIG. 5 b) in an LCD apparatus 2 according to another embodiment. The stacked light deflecting diffuser sheet 100X is an embodiment of the stacked optical sheet 100 of FIG. 4. The stacked light deflection diffusion sheet 100X may be disposed between the liquid crystal panel 10 and the surface light emitting module 20 of fig. 4.
Referring to fig. 6a, a stacked light deflection diffusion sheet 100X may include a stacked light deflection diffusion sheet 90X, a reflective deflection sheet 50, and a bonding layer 43, the bonding layer 43 combining the stacked light deflection diffusion sheet 90X and the reflective deflection sheet 50.
The stacked light deflection diffusion sheet 90X may include a light deflection diffusion sheet 70X, a light deflection sheet 80, and a bonding layer 42, the bonding layer 42 combining the light deflection diffusion sheet 70X and the light deflection diffusion sheet 80.
The light deflection diffusion sheet 70X may include a first substrate 71, a light diffusion layer 73X disposed on a lower surface of the first substrate 71, and a first light deflection sheet 72 disposed on an upper surface of the first substrate 71.
The first substrate 71 may include a material such as PET (polyethylene terephthalate) or polyester and may transmit incident light. The first substrate 71 may have a thickness of from about 50 to 300 μm, but is not limited thereto.
The light diffusion layer 73X may be disposed on a lower surface of the first substrate 71, i.e., on a surface of the surface light emitting module 20 of the first substrate 71. The light diffusion layer 73X may include a flat base 73B and a light diffusion portion 73P, the light diffusion portion 73P being formed below the base 73B and having a rough surface R2 functioning to diffuse light.
The light diffusion part 73P may have a thickness from about 20 to 50 μm, but is not limited thereto.
The base 73B has a thickness of from about 5 μm to 10 μm, but is not limited thereto.
Light emitted from the light source 21 of the surface light-emitting module 20 and then passing through the light guide plate 22 and being incident into the light diffusion layer 73X may be diffused and scattered by the rough surface R2 of the light diffusion layer 73X. The light diffusion layer 73X may diffuse and scatter light and supply the light to the first light deflecting layer 72.
The first optical deflection layer 72 may be disposed on the upper surface of the first substrate 71, i.e., on the surface of the liquid crystal panel 10 of the first substrate 71. The first light deflecting layer 72 may include a flat base 72B and a prism pattern 72P, and the prism pattern 72P is formed above the base 72B and controls the traveling direction of light.
The first prism pattern 72P has a thickness from about 20 to 50 μm, but is not limited thereto. Further, the apex angle of the first prism pattern 72P may have a range of 90 ° ± 5 °, but is not limited thereto.
The base 72B has a thickness of from about 5 μm to 10 μm, but is not limited thereto.
The light diffusion layer 73X and the first light deflection layer 72 may include a light transmitting resin such as an acrylic resin or the like.
The bonding layer 42 connecting the ridges L2 may be formed on the plurality of first prism patterns 72P of the first optical deflection layer 72. Between two adjacent prism patterns 72P, an air portion a2 surrounded by the two adjacent prism patterns 72P and the bonding layer 42 may be formed. The bonding layer 42 may not be formed in the air part a 2. Accordingly, light emitted from each surface of the first prism patterns 72P may not be diffracted by the bonding layer 42 and a traveling direction of the light may be controlled.
Further, the bonding layer 42 may combine and integrate the light deflection diffusion sheet 70X and the reflective deflection sheet 80 into the stacked light deflection diffusion 90X.
In the use of a liquid crystal TV or the like, the luminance of the LCD device 2 may be more than 2900cd/m2And preferably more than 3000cd/m2。
In use of a liquid crystal TV or the like, both the horizontal viewing angle and the vertical viewing angle of the LCD device 2 may be more than 52 ° and may preferably be more than 55 °.
The horizontal viewing angle and the vertical viewing angle may be angles having a central brightness of 1/2.
In order to suit the brightness and viewing angle of the LCD device 2, the haze value of the light diffusion portion 73P of the light diffusion layer 73X may range from about 5% to about 70%, preferably from about 5% to 30%, and particularly from 5% to 20%.
The method of manufacturing the light deflection diffusion sheet 70X may be the same as the method of manufacturing the light deflection diffusion sheet 30X described above.
Referring to fig. 6b, the light deflection sheet 80 may be disposed in the direction of the liquid crystal panel 10 of the light deflection diffusion sheet 70X. The light deflection sheet 80 may comprise a second substrate 81 and a second light deflection layer 82 arranged on the upper surface of the second substrate 81.
The second substrate 81 may include a material such as PET (polyethylene terephthalate) or polyester and may transmit incident light. The second substrate 81 may have a thickness of from about 50 to 300 μm, but is not limited thereto.
The second optical deflection layer 82 may be disposed on the upper surface of the first substrate 81, that is, on the surface of the liquid crystal panel 10 of the second substrate 81. The second light deflecting layer 82 may include a flat base 82B and a second prism pattern 82P, and the second prism pattern 82P is formed over the base 82B and controls the traveling direction of light.
The second prism pattern 82P has a thickness from about 20 to 50 μm, but is not limited thereto. Further, the apex angle of the second prism pattern 82P may have a range of 90 ° ± 5 °, but is not limited thereto.
The base 82B has a thickness of from about 5 μm to 10 μm, but is not limited thereto.
The second light deflecting layer 82 may include a light transmissive resin such as an acrylic resin or the like.
The bonding layer 43 connecting the ridges L3 may be formed on the plurality of second prism patterns 82P of the second optical deflection layer 82. Between two adjacent prism patterns 82P, an air portion a3 surrounded by the two adjacent prism patterns 82P and the bonding layer 43 may be formed. The bonding layer 43 may not be formed in the air portion a 3. Accordingly, light emitted from each surface of the second prism patterns 82P may not be diffracted by the bonding layer 43 and a traveling direction of the light may be controlled.
Further, the bonding layer 43 may combine and integrate the stacked light deflection diffusion sheet 90X and the reflective deflection sheet 50 into the stacked light deflection diffusion sheet 100X.
Referring to fig. 7, the stacked light deflection diffusion sheet 100Y may include a stacked light deflection diffusion sheet 90X, a reflective deflection sheet 50, and a bonding layer 43, the bonding layer 43 combining the stacked light deflection diffusion sheet 90Y and the reflective deflection sheet 50. The reflective deflection sheet 50 and the bonding layer 43 may be the same as the reflective deflection sheet 50 and the bonding layer 43 of FIGS. 6a and 6b described above, and thus, descriptions thereof are omitted.
The stacked light deflection diffusion sheet 90Y may include a light deflection diffusion sheet 70Y, a light deflection sheet 80, and a bonding layer 42, the bonding layer 42 combining the light deflection diffusion sheet 70Y and the light deflection diffusion sheet 80. The light turning plate 80 and the bonding layer 42 may be the same as the light turning plate 80 and the bonding layer 42 of fig. 6a and 6b described above, and thus a description thereof is omitted.
The light deflection diffusion sheet 70Y may include a first substrate 71, a light diffusion layer 73Y disposed on a lower surface of the first substrate 71, and a first light deflection sheet 72 disposed on an upper surface of the first substrate 71. The first optical substrate 71 and the first optical deflection layer 72 may be the same as the first substrate 71 and the first optical deflection layer 72 of fig. 6a and 6b described above, and thus a description thereof is omitted.
The light diffusion layer 73Y may be disposed on a lower surface of the first substrate 71, i.e., on a surface of the surface light emitting module 20 of the first substrate 71. The light diffusion layer 73Y may include a light-transmitting resin layer 73M and a plurality of light-scattering beads B2 formed in the light-transmitting resin layer 73M.
Light emitted from the light source 21 of the surface light-emitting module 20 and then passing through the light guide plate 22 and being incident into the light diffusion layer 73Y may be diffused and scattered by the light scattering beads B2 of the light diffusion layer 73Y. The light diffusion layer 73Y may diffuse and scatter light and supply the light to the first light deflecting layer 72.
The light scattering bead B2 may be formed of an acrylic resin, a styrene synthetic resin, or the like.
The light diffusion layer 73Y may have a thickness from about 20 to 50 μm, but is not limited thereto.
Each of the light scattering beads B2 may have a diameter of from about 0.1 μm to 50 μm, but is not limited thereto. The light scattering bead B2 may have a uniform diameter and may have different diameters. Further, the diameter and distribution density of the light scattering beads B2 may be adjusted according to the haze value to be implemented.
In order to suit the brightness and viewing angle of the LCD device 2, the haze value of the light diffusion layer 73Y may range from about 5% to about 70%, preferably from about 5% to 30%, and particularly from 5% to 20%.
The method of manufacturing the light deflection diffusion sheet 70Y may be the same as the method of manufacturing the light deflection diffusion sheet 30Y described above.
Stacking the optical sheets 100X and 100Y according to the above embodiment may reduce the amount of glue or adhesive used, thereby reducing optical loss of the LCD device 2 and enhancing brightness and viewing angle of the LCD device 2, as compared to a technique of combining layers by using glue or adhesive. Further, a low-cost and concise manufacturing process of the LCD device 2 can be promoted.
Fig. 8 is a cross-sectional view of a bonding layer 40 according to an embodiment. The bonding layers 41, 42 and 43 may be the bonding layer 40 of fig. 8.
Referring to fig. 8, the bonding layer 40 may include a base layer 40X, an adhesive layer 40Z disposed on one surface of the base layer 40X, and a light diffusion type adhesive part 40Y disposed on the other surface of the base layer 40X. One surface of the base layer 40X may be a surface of the surface light emitting module 20 of the base layer 40C, and the other surface thereof may be a surface of the liquid crystal panel 10 of the base layer 40X.
The base layer 40X may be formed of a light-transmitting resin such as PET (polyethylene terephthalate) or the like.
The prism pattern may be bonded to the adhesive layer 40Z. If the concave portions of the prism pattern are filled with an adhesive or the like, deterioration in brightness may occur because a refraction effect of light occurs through the prism pattern. To avoid this phenomenon, the thickness of the adhesive layer 40Z may be several micrometers, and only a portion of the prism pattern may be bonded to the adhesive layer 40Z. Thus, the recesses of the prism pattern, i.e., the air portions, may not be filled with the adhesive layer 40Z.
The adhesive layer 40Z may include at least one of an acrylic adhesive, a silicone adhesive, a urethane adhesive, an epoxy adhesive, a cellulose adhesive, and a rubber adhesive.
Each of the light scattering beads 40B may have a diameter of from about 1 μm to 4 μm. The light scattering beads 40B may be of uniform diameter and may be of different diameters. The light scattering beads 40B may include inorganic materials such as silica, alumina, Titania (TiO)2) Zirconium oxide (ZrO)2) Tin oxide, indium oxide, cadmium oxide, antimony oxide, and the like. Furthermore, light scattering beadsThe shape portion 40B may include a polymer material such as a silicone-based resin, an acrylic-based resin, a styrene-based resin, a urethane-based resin, a melamine-based resin, or the like. The light scattering bead 40B may comprise a variety of materials.
Each of the light scattering beads 40B may have a refractive index of from about 1.30 to about 1.70. The difference between the light scattering beads 40B and the light transmissive adhesive layer 40M may be in the range of about 0.01 to about 0.13.
The light scattering bead 40B content in the light diffusing adhesive portion 40Y may range from about 0.3 wt% to about 50 wt%.
Light incident to the surface of the surface light emitting module 20 of the bonding layer 40, that is, incident to the adhesive layer 40Z, may pass through the base layer 40Y and may be incident into the light diffusion type adhesive part 40Y. The light incident into the light diffusion type adhesive portion 40Y may be diffused and scattered by the light scattering bead portion 40B and may be emitted to the surface of the liquid crystal panel 10 of the bonding layer 40.
The bonding layer 40 may bond adjacent sheets to each other and diffuse incident light, and thus the sheets may be prevented from being bent, and handling of the sheets may be enhanced, thereby facilitating assembly of the LCD device and simultaneously enhancing optical characteristics such as brightness and viewing angle.
The embodiments are examples and, thus, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention. Accordingly, the embodiments should be considered in descriptive sense only and not for purposes of limitation. For example, each constituent element described in the singular may be embodied in the plural. Further, constituent elements described in plural may be embodied in combination.
Although one or more embodiments have been described with reference to the accompanying drawings, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope defined by the following claims.

Claims (11)

1. A Liquid Crystal Display (LCD) device, comprising:
a liquid crystal panel having a length direction and a width direction;
the absorption deflection sheet is arranged at the lower part of the liquid crystal panel;
a surface light emitting module;
a substrate disposed between the liquid crystal panel and the surface light emitting module;
a light diffusion layer that is disposed on a surface of the substrate facing the surface light-emitting module and diffuses light incident from the surface light-emitting module;
a light deflection layer that is provided on a surface of the substrate facing the liquid crystal panel and controls a traveling direction of light;
a reflective deflection sheet that is provided between the liquid crystal panel and the light deflection layer and reflects deflected light to be absorbed by the absorptive deflection sheet to the surface light emitting module in advance; and
a bonding layer disposed between the light redirecting layer and the reflective deflection sheet,
wherein the bonding layer comprises a base layer, an adhesive layer provided on one surface of the base layer, and a light diffusion type adhesive layer provided on the other surface of the base layer, an
The plurality of light scattering beads included in the light diffusion type adhesive layer diffuses, scatters, and emits light incident into the light diffusion type adhesive layer to a surface of the liquid crystal panel.
2. The LCD apparatus of claim 1, wherein the surface light emitting module comprises at least one of an edge type surface light emitting module or a direct type surface light emitting module.
3. The LCD device of claim 1, wherein the light deflecting layer comprises a prism pattern having a ridge parallel to the length direction of the liquid crystal panel.
4. The LCD apparatus of claim 1, wherein the light diffusion layer comprises a rough surface that diffuses and scatters light.
5. The LCD device of claim 1, wherein the light diffusing layer comprises a plurality of light scattering beads that diffuse and scatter light.
6. A Liquid Crystal Display (LCD) device, comprising:
a liquid crystal panel having a length direction and a width direction;
the absorption deflection sheet is arranged at the lower part of the liquid crystal panel;
a surface light emitting module;
a first substrate disposed between the liquid crystal panel and the surface light emitting module;
a light diffusion layer that is disposed on a surface of the first substrate facing the surface light-emitting module and diffuses light incident from the surface light-emitting module;
a first light deflection layer that is provided on a surface of the first substrate facing the liquid crystal panel and controls a traveling direction of light;
a second substrate disposed between the liquid crystal panel and the first light deflection layer;
a second light deflection layer disposed on a surface of the second substrate facing the liquid crystal panel;
a reflective deflection sheet that is provided between the liquid crystal panel and the second light deflection layer and reflects deflected light to be absorbed by the absorptive deflection sheet to the surface light emitting module in advance; and
a bonding layer disposed between the second light redirecting layer and the reflective deflection sheet,
wherein the bonding layer comprises a base layer, an adhesive layer provided on one surface of the base layer, and a light diffusion type adhesive layer provided on the other surface of the base layer, an
The plurality of light scattering beads included in the light diffusion type adhesive layer diffuses, scatters, and emits light incident into the light diffusion type adhesive layer to a surface of the liquid crystal panel.
7. The LCD apparatus of claim 6, wherein the surface light emitting module comprises at least one of an edge type surface light emitting module or a direct type surface light emitting module.
8. The LCD device of claim 6, wherein the first and second electrodes are arranged in a common plane,
wherein the first light deflecting layer includes a first prism pattern having a ridge portion parallel to the width direction of the liquid crystal panel, and
wherein the second light deflecting layer includes a second prism pattern having a ridge portion parallel to the longitudinal direction of the liquid crystal panel.
9. The LCD apparatus of claim 6, wherein the light diffusion layer comprises a rough surface that diffuses and scatters light.
10. The LCD device of claim 6, wherein the light diffusing layer comprises a plurality of light scattering beads that diffuse and scatter light.
11. A light deflection diffusion sheet disposed between a liquid crystal panel having a length direction and a width direction and a surface light emitting module, the light deflection diffusion sheet comprising:
a substrate;
a light diffusion layer that is disposed on a surface of the substrate facing the surface light-emitting module and diffuses light incident from the surface light-emitting module;
a light deflection layer that is provided on a surface of the substrate facing the liquid crystal panel and controls a traveling direction of light;
a reflective deflection sheet that is disposed between the liquid crystal panel and the light deflection layer and reflects deflected light to be absorbed by an absorption deflection sheet disposed at a lower portion of the liquid crystal panel to the surface light emitting module in advance; and
a bonding layer disposed between the light redirecting layer and the reflective deflection sheet,
wherein the bonding layer comprises a base layer, an adhesive layer provided on one surface of the base layer, and a light diffusion type adhesive layer provided on the other surface of the base layer, an
The plurality of light scattering beads included in the light diffusion type adhesive layer diffuses, scatters, and emits light incident into the light diffusion type adhesive layer to a surface of the liquid crystal panel.
CN201580067245.9A 2014-12-10 2015-12-09 Light deflection diffusion sheet, stacked optical sheet, and liquid crystal display device using the same Expired - Fee Related CN107003565B (en)

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KR20160070714A (en) 2016-06-20
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